A photographer tested the concentration of several pairs of dogs as he captured their reactions to treat time in a series of shots. Christian Vieler, 47, of Waltrop, Germany, has been a professional dog photographer since 2016. He came up with the idea of snapping two dogs catching treats simultaneously. Here: Basset Hounds. (Photo by Vieler Photography/Caters News Agency)

A curious trio of owl monkeys peep out of a tree hollow on the Marañón River near the city of Nauta, Peru in April 2024. (Photo by James Cai/Solent News)

A woman holding a dog walks out of a plane during a press event introducing Bark Air, an airline for dogs, at Republic Airport in East Farmingdale, New York on May 21, 2024. (Photo by Eduardo Munoz/Reuters)

A child performs in the mutton bustin (sheep riding) at the rodeo performance of the 76th annual Cloverdale Rodeo and Country Fair in Surrey, British Columbia, Canada, on May 18, 2024. (Photo by Xinhua News Agency/Rex Features/Shutterstock)

Revelers run through the festival grounds to see the next show at the Governors Ball music festival at Corona Park in the Queens borough of New York City, U.S., June 9, 2024. (Photo by Cheney Orr/Reuters)

American singer-songwriter Katy Perry in the second decade of June 2024 posed in a white bra top with heavy black metallic leg armour to announce her new single Woman’s World. (Photo by Katy Perry/Instagram)

A spoonbill appears to creep across the sky as it comes in to land on a nearby branch in the Orlando Wetlands, Florida in the second decade of June 2024. (Photo by Deborah Sandidge/Solent News)

A model presents a creation by Indian designer Amit Aggarwal during the FDCI India Couture Week in New Delhi on July 28, 2024. (Photo by Sajjad Hussain/AFP Photo)